Abstract
Abstract A high triplet energy material derived from carbazole and pyridine, 9,9′-(5-(2-methylpyridin-3-yl)-1,3-phenylene)bis(9H-carbazole), was synthesized as the host material for blue and white phosphorescent organic light-emitting diodes. The 9,9′-(5-(2-methylpyridin-3-yl)-1,3-phenylene) bis(9H-carbazole) host showed a high triplet energy of 2.99 eV for efficient energy transfer to blue triplet emitter. High quantum efficiencies of 19.8% and 17.1% were achieved in blue and white phosphorescent organic light-emitting diodes using the 9,9′-(5-(2-methylpyridin-3-yl)-1,3-phenylene)bis(9H- carbazole) host material. In addition, the 9,9′-(5-(2-methylpyridin-3-yl)- 1,3-phenylene)bis(9H-carbazole) based white phosphorescent organic light-emitting diodes showed good color stability.
| Original language | English |
|---|---|
| Pages (from-to) | 34-38 |
| Number of pages | 5 |
| Journal | Dyes and Pigments |
| Volume | 103 |
| DOIs | |
| State | Published - Apr 2014 |
| Externally published | Yes |
Keywords
- Blue device
- Carbazole
- Color stability
- High triplet energy
- Keywords
- Quantum efficiency
- White device